diff --git "a/leetcode3/\354\227\274\355\230\234\354\240\225/3992. Rearrange String to Avoid Character Pair.java" "b/leetcode3/\354\227\274\355\230\234\354\240\225/3992. Rearrange String to Avoid Character Pair.java"
new file mode 100644
index 00000000..8011c448
--- /dev/null
+++ "b/leetcode3/\354\227\274\355\230\234\354\240\225/3992. Rearrange String to Avoid Character Pair.java"	
@@ -0,0 +1,16 @@
+// O(n)
+
+class Solution {
+    public String rearrangeString(String s, char x, char y) {
+        StringBuilder left = new StringBuilder();
+        StringBuilder mid = new StringBuilder();
+        StringBuilder right = new StringBuilder();
+
+        for (char c : s.toCharArray()) {
+            if (c == y) left.append(c);
+            else if (c == x) right.append(c);
+            else mid.append(c);
+        }
+        return left.toString() + mid.toString() + right.toString();
+    }
+}